Question 1

What is the population of Querrien?

Accepted Answer

The commune of Querrien has 1,654 inhabitants per the INSEE census.

Question 2

Are there natural risks in Querrien?

Accepted Answer

Yes, Querrien is exposed to 4 natural risk(s): Affaissements et effondrements d'origine anthropique (anciennes carrières souterraines, hors mines), Mouvement de terrain, Radon, Séisme. Source: Géorisques / GASPAR.

Question 3

What is the energy performance of homes in Querrien?

Accepted Answer

Out of 196 ADEME EPCs available in Querrien, the most common label is D. 5% are rated A or B.

Question 4

What is the crime rate in Querrien?

Accepted Answer

In 2025, the crime rate in Querrien was 12.8 offences per 1,000 inhabitants (burglaries, theft, violence, vandalism). Source: SSMSI / French Ministry of the Interior.

Question 5

Is the tap water safe to drink in Querrien?

Accepted Answer

Tap water in Querrien is compliant with quality standards. Source: ARS / Hub'eau. (883 analyses over 12 months)

Question 6

What is the air quality in Querrien?

Accepted Answer

According to LCSQA stations (5-year mean) in Querrien: PM2.5 : 8.4 µg/m³, NO₂ : 9.3 µg/m³, PM10 : 14.3 µg/m³. Source: LCSQA / Géod'air.